D01 Properties of digestates from anaerobic digestion: Nutrient and chemical characteristics

Описание: This video is Mary’s first in the series focussing on digestates from anaerobic digestion (biogas).
Mary summarises how digestate (biogas residue) is produced via anaerobic digestion, and describes the properties of digestates. Digestates discussed and compared are from a range of feedstocks including food waste, potato residue, manure, slurry and purpose grown crops (maize), being either whole, separated liquor (liquid) or fibre (solid) digestates. This includes plant macro nutrients (N, P, K, Mg, S, Ca) and micro nutrients (B, Cu, Fe, Mn, Zn), pH, electrical conductivity and dry matter. Mary also discusses the potential fertilizer value of digestates, as compared to standard N, P and K inorganic fertilizers.
This video is useful for farmers, advisors, agronomists, agriculture students, AD site operators and policy makers in understanding the properties of a range of digestates, and how they can vary depending on the feedstock and post-AD treatment.

The title music includes photos of a range of crops which could be used for anaerobic digestion including maize, cup plants (yellow flowers), rye, perennial biodiverse flowering mix (final photo). There are also photos of growth trials where different digestates were used - more on digestate use in horticulture in the following videos in this series.